Sunrise 5:48 AM   Sunset 6:56 PM Moonrise 9:58 AM   Moonset 11:51 PM

  Print   HELP   Reset   Save   Recall  New

PHZ119 Maalaea Bay- 314 Am Hst Sun May 12 2024
Today - North northeast winds 10 to 15 knots, becoming north to 20 knots this afternoon. Seas to 2 feet or less. Tonight - North winds to 20 knots. Seas to 2 feet or less. Isolated showers. Monday - North winds 15 to 20 knots. Seas to 2 feet or less. Isolated showers in the afternoon. Monday night - North northeast winds to 15 knots in the evening, becoming variable less than 10 knots. Seas to 2 feet or less. Isolated showers in the evening. Tuesday - Winds variable less than 10 knots. Seas to 2 feet or less. Isolated showers in the afternoon. Tuesday night - Winds variable less than 10 knots. Seas to 2 feet or less. Isolated showers. Wednesday - Winds variable less than 10 knots, becoming south to 10 knots. Seas to 3 feet. Scattered showers in the afternoon. Numerous showers with isolated Thunderstorms through the day. Thursday - South southwest winds to 10 knots, becoming variable less than 10 knots. Seas to 3 feet. Isolated showers in the morning. Isolated Thunderstorms. Scattered showers.
winds and seas higher in and near tstms.

PHZ100 314 Am Hst Sun May 12 2024
Synopsis for hawaiian coastal waters - A trough of low pressure over the waters will shift westward today and tonight as high pressure builds northeast of the state. The trough will amplify west of the islands Monday and Tuesday, then merge with a front and approach from the west Wednesday and move into the waters on Thursday.

FXHW60 PHFO 121337 AFDHFO

Area Forecast Discussion National Weather Service Honolulu HI 337 AM HST Sun May 12 2024

SYNOPSIS
Weather conditions are improving across the state as the upper level low slowly drifts eastward away from the island chain.
Localized heavy rain and isolated thunderstorms limited to the eastern half of the state. Brief periods of showers in a light wind pattern will continue into the first half of the week. A stronger low approaches the islands from the north on Wednesday with unstable southerly kona winds, pulling up deeper tropical moisture, and producing periods of heavy showers and thunderstorms across the state through at least Friday. The weather for next weekend may remain unsettled.

DISCUSSION
The upper level low over the islands continues to weaken and slowly drift east. The best forcing and lift associated with an upper level trough on the south side of this low has moved east of the Big Island, decreasing heavy shower and thunderstorm activity across the state. Light southeasterly background winds will continue to interact with local scale land and sea breezes over each island through Tuesday. The best chances for clouds and showers will develop over island mountain and interior sections each day with decreasing clouds and showers at night.

Monday through Tuesday...Heavy rain and thunderstorm threats diminish by Monday as the low weakens and slowly drifts northeastward away from the state. Light large scale southeasterly winds will continue to allow local scale land and sea breezes to develop over all islands. Weak upper level troughing however will keep brief periods of showers in the forecast favoring island mountain and interior sections each afternoon and early evening through Tuesday.

Wednesday through Friday...The latest model guidance remains in fair agreement that another unseasonably strong low will approach the islands from the north on Wednesday. A surface low forming under the upper low will be stronger than the previous system and may produce southerly kona winds over the western half of the state. The latest forecast guidance shows the surface low center will setup roughly 600 miles northwest of Kauai by Thursday.
Unsurprisingly this surface low position has changed a bit over the past 24 hours. However global model solutions continue to show a trailing surface trough with southerly kona winds brewing over the islands through this time period. This unstable southerly kona wind flow and surface trough may bring another round of heavy rain and thunderstorms favoring the western islands of Niihau, Kauai and Oahu from Wednesday through Friday. In the latest model solutions Kauai County and Oahu are under the highest threats for flooding, thunderstorms, and strong gusty winds during this time period.

This portion of the long range weather forecast will likely change over time. Much of these severe weather impacts are highly dependent upon the precise location of this low pressure system and surface trough relative to each island. Small changes to the location of the low center will make large changes to the forecast for each island. Stay tuned for changes to the long range local weather forecast, as the time period grows shorter, and island by island weather impacts evolve.

AVIATION
A lingering upper level disturbance will gradually weaken through today but could still provide enough instability for a few heavy showers bringing MVFR and IFR conditions. Isolated thunderstorms will still be possible over the Big Island today. Showers overall should be slightly less widespread/intense than yesterday. East- southeast winds will remain light enough to allow for sea breezes this afternoon where clouds and showers could build up over island interiors.

AIRMET Sierra for tempo mountain obscuration is in effect over the east facing slopes of the Big Island and will likely remain in place through much of the day. AIRMET IFR could be needed if showers become heavy and persistent.

AIRMET Tango for moderate to isolated severe mid to upper level turbulence remains in effect and will likely improve later in the morning as the area of stronger turbulence moves east.

AMD NOT SKED for PMDY continues due to equipment issues, with no timeline for restoration. AMD NOT SKED for PHJR also due to equipment issues.

MARINE
Moderate to fresh east-southeast trade winds will return from west to east across the island chain today and persist through Monday. Winds will weaken Monday night and become more southerly on Tuesday as troughing amplifies to the west of the state.
Moderate southerly winds will develop in advance of a front Wednesday, with the front then moving into the islands on Thursday with moderate northwesterly winds developing behind the front over the western end of the state, while moderate southerly winds prevail in advance of the feature.

Surf along south facing shores will slowly decline today through Tuesday. Another series of overlapping, long-period south swells will begin moving in on Tuesday, with reinforcements giving another noticeable boost to south shore surf Wednesday through next weekend.

A small, short-period north swell will decline today. A reinforcing small, long-period northwest swell will build tonight, giving north shore surf a boost Monday and Tuesday. A series of small reinforcing northwest swells will keep some small surf moving into north facing shores Wednesday into next weekend.

Surf along east facing shores will remain well below normal levels through late next week.

HFO WATCHES/WARNINGS/ADVISORIES
None.

toggle option: (graph/table)

Makena
Click for Map
Sun -- 03:03 AM HST     0.06 feet Low Tide
Sun -- 05:49 AM HST     Sunrise
Sun -- 07:05 AM HST     0.14 feet High Tide
Sun -- 09:58 AM HST     Moonrise
Sun -- 11:10 AM HST     0.06 feet Low Tide
Sun -- 06:54 PM HST     Sunset
Sun -- 07:35 PM HST     1.76 feet High Tide
Sun -- 11:51 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION

Makena, Maui Island, Hawaii, Tide feet

Kihei
Click for Map
Sun -- 03:13 AM HST     0.06 feet Low Tide
Sun -- 05:49 AM HST     Sunrise
Sun -- 07:36 AM HST     0.54 feet High Tide
Sun -- 09:58 AM HST     Moonrise
Sun -- 11:20 AM HST     0.06 feet Low Tide
Sun -- 06:54 PM HST     Sunset
Sun -- 08:06 PM HST     2.16 feet High Tide
Sun -- 11:51 PM HST     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION

Kihei, Maui (Hawaii) (2), Tide feet

Full Color Weather Map

Link to Loop


Other links: GEOS-West     Contential US     Full GOES-East

Molokai/Honolulu,HI